1098635 has 4 divisors (see below), whose sum is σ = 1318368. Its totient is φ = 878904.

The previous prime is 1098631. The next prime is 1098649. The reversal of 1098635 is 5368901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1098635 - 2² = 1098631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109859 + ... + 109868.

It is an arithmetic number, because the mean of its divisors is an integer number (329592).

2^1098635 is an apocalyptic number.

1098635 is a deficient number, since it is larger than the sum of its proper divisors (219733).

1098635 is an equidigital number, since it uses as much as digits as its factorization.

1098635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219732.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1098635 is about 1048.1579079509. The cubic root of 1098635 is about 103.1852950123.

The spelling of 1098635 in words is "one million, ninety-eight thousand, six hundred thirty-five".